Table 3.
ANOVA results for the effects of earthworms and plant community composition on plant growth, plant quality and slug herbivory
| |
Earthworms |
Plant community comp. |
Ew x Pl.cc. |
|||
|---|---|---|---|---|---|---|
| Variable | F | P | F | P | F | P |
|
Plant growth |
|
|
|
|
|
|
|
Focus spp. leaf length (cm) |
0.030 |
0.863 |
2.307 |
0.130 |
0.056 |
0.813 |
|
A. elatius |
0.092 |
0.763 |
2.819 |
0.098 |
0.208 |
0.650 |
|
P. vulgaris |
0.048 |
0.828 |
12.106 |
0.001 |
2.438 |
0.124 |
|
T. pratense |
6.181 |
0.016 |
28.918 |
<0.001 |
0.028 |
0.866 |
|
Focus spp. tiller numbers (funct. gr.-1) |
1.425 |
0.234 |
12.396 |
0.001 |
1.643 |
0.201 |
|
A. elatius |
0.815 |
0.370 |
2.481 |
0.120 |
2.364 |
0.129 |
|
P. vulgaris |
0.014 |
0.906 |
7.704 |
0.007 |
0.507 |
0.479 |
|
T. pratense |
2.700 |
0.105 |
9.094 |
0.004 |
0.001 |
0.003 |
|
Focus plants shoot biomass |
1.119 |
0.290 |
4.012 |
0.045 |
2.200 |
0.138 |
|
A. elatius shoot mass |
4.624 |
0.032 |
6.184 |
0.013 |
4.948 |
0.027 |
|
P. vulgaris shoot mass |
0.629 |
0.428 |
0.187 |
0.665 |
0.163 |
0.687 |
|
T. pratense shoot mass |
0.009 |
0.926 |
9.457 |
0.002 |
0.006 |
0.936 |
|
Total plant biomass (g mesoc.-1) |
3.375 |
0.073 |
11.332 |
0.002 |
5.246 |
0.027 |
| Total shoot biomass |
2.511 |
0.120 |
10.986 |
0.002 |
5.751 |
0.021 |
| Total root biomass |
2.770 |
0.103 |
4.934 |
0.032 |
1.281 |
0.264 |
| Total grass shoots |
0.344 |
0.560 |
36.226 |
<0.001 |
2.302 |
0.136 |
| Total forb shoots |
2.744 |
0.105 |
133.920 |
<0.001 |
5.040 |
0.033 |
| Total legume shoots |
0.891 |
0.350 |
0.115 |
0.736 |
0.304 |
0.584 |
|
Plant quality |
|
|
|
|
|
|
|
Total plant Ctot (%) |
0.096 |
0.758 |
0.114 |
0.736 |
0.004 |
0.949 |
|
A. elatius Ctot |
3.229 |
0.080 |
1.800 |
0.187 |
0.003 |
0.955 |
|
P. vulgaris Ctot |
0.001 |
0.988 |
0.018 |
0.893 |
0.010 |
0.922 |
|
T. pratense Ctot |
1.467 |
0.232 |
0.073 |
0.789 |
1.416 |
0.240 |
|
Total plant Ntot (%) |
7.022 |
0.009 |
0.215 |
0.643 |
0.159 |
0.691 |
|
A. elatius Ntot |
5.728 |
0.021 |
0.127 |
0.723 |
0.056 |
0.814 |
|
P. vulgaris Ntot |
5.855 |
0.017 |
2.070 |
0.160 |
0.098 |
0.756 |
|
T. pratense Ntot |
5.604 |
0.022 |
0.121 |
0.730 |
3.394 |
0.072 |
|
Total plant C:N ratio |
6.324 |
0.013 |
0.232 |
0.631 |
0.045 |
0.833 |
|
A. elatius C:N ratio |
5.560 |
0.023 |
0.001 |
0.985 |
0.095 |
0.756 |
|
P. vulgaris C:N ratio |
0.360 |
0.553 |
1.484 |
0.232 |
0.073 |
0.789 |
|
T. pratense C:N ratio |
5.078 |
0.029 |
0.001 |
0.992 |
2.561 |
0.117 |
|
Slug herbivory |
|
|
|
|
|
|
|
No. damaged leaves after 3 days |
0.406 |
0.531 |
2.075 |
0.165 |
0.002 |
0.965 |
|
P. vulgaris leaves damaged |
0.006 |
0.939 |
4.531 |
0.041 |
0.028 |
0.869 |
|
T. pratense leaves damaged |
0.138 |
0.714 |
5.248 |
0.033 |
0.138 |
0.714 |
|
No. damaged leaves after 6 days |
7.667 |
0.012 |
0.754 |
0.395 |
0.087 |
0.771 |
|
P. vulgaris leaves damaged |
2.621 |
0.121 |
11.346 |
0.003 |
1.555 |
0.227 |
|
T. pratense leaves damaged |
4.961 |
0.038 |
24.719 |
<0.001 |
4.613 |
0.044 |
|
Total leaf area eaten mesocosm-1 |
0.754 |
0.387 |
10.371 |
0.002 |
3.432 |
0.066 |
|
P. vulgaris leaf area eaten |
0.374 |
0.543 |
5.500 |
0.023 |
1.750 |
0.191 |
| T. pratense leaf area eaten | 0.606 | 0.440 | 6.803 | 0.012 | 0.010 | 0.922 |
P-values after sequential Bonferroni corrrections.